Investigation of the luminescence properties of ZnO clusters induced by single-photon and two-photon excitation

被引：1
作者：
Dai, Jun [1 ]
Li, Zhengguo [1 ]
Zhang, Yi [1 ]
Chen, Yongzhu [1 ]
Zhu, Xing [1 ]
Chen, Jingdong [2 ]
机构：
[1] Guangdong Polytech Normal Univ, Sch Optoelect Engn, Guangzhou 510665, Peoples R China
[2] Minnan Normal Univ, Coll Phys & Informat Engn, Zhangzhou 363000, Peoples R China
来源：
LASER PHYSICS LETTERS | 2021年 / 18卷 / 10期
关键词：
nonlinear optics; luminescence; clusters; biophotonics; zinc oxide; QUANTUM DOTS; ZINC-OXIDE; NANOFLOWERS; EMISSION;
D O I：
10.1088/1612-202X/ac22b5
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
By using a luminescence spectrometer and femtosecond laser, we have investigated the specific optical properties and excitation mechanism of ZnO clusters with one-photon and two-photon excitations. When the excitation wavelength was chosen to be 360 nm, the strongest luminescence intensity was observed. However, the luminescence intensity decreased gradually and the emission peak was red shifted slowly with increasing excitation wavelength (from 360 to 400 nm). When the excitation wavelength was chosen to be 780 nm, the luminescence intensity increased nonlinearly with increasing excitation intensity. What is even more interesting is that ZnO clusters could be used in the imaging of living cells under two-photon excitation, implying the potential applications for the optical properties of ZnO clusters in the field of biophotonics.
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页数：7
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